Year: 2025
Type: article
Abstract: Insulating antiferromagnets are anticipated as the main protagonists of ultrafast spintronics, with their intrinsic terahertz dynamics and their ability to transport spin information over long distances. However, ultrafast transfer of spin angular momentum to an antiferromagnetic insulator remains to be demonstrated. Here, studying the picosecond and subpicosecond dynamics of ferromagnetic metal/antiferromagnetic insulator bilayers, we evidence the generation of coherent terahertz excitations in the antiferromagnet combined with a modulation of the demagnetization behavior in the ferromagnet. We thus demonstrate that magnetic information can indeed be propagated into antiferromagnetic spin waves at picosecond timescales, thereby opening an avenue toward ultrafast manipulation of magnetic information.
Source: Science Advances
Institutions: Centre National de la Recherche Scientifique, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, CEA Paris-Saclay - Etablissement de Saclay, Service de Physique de l'État Condensé, CEA Paris-Saclay, Université de Montpellier, Laboratoire Albert Fert, Laboratoire Charles Coulomb, CentraleSupélec, Laboratoire Structures, Propriétés et Modélisation des Solides, Université d'Évry Val-d'Essonne
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,500
Awards: Tailoring topological states in multiferroics, Femtosecond spincurrents for ultrafast spintronics, G4181409150, G434337789, G4344760965, Altermagnetic spintronics, Engineering Diamond Sensors for Advancing Science and Industry, Paris-Saclay multidisciplinary Nano-Lab, THz dynamics in MUltiFerroIc Nanostructures and Superlattices, G6984882037, G7240651115, Topological Solitons in Antiferroics, Towards spin-based THz technology
OpenAlex ID: W4416012188